Abstract: Techniques are disclosed for multi-hop security amplification. The techniques disclosed provide multi-hop security amplification by applying a secret sharing scheme to data as the data is routed within a network to an intended recipient device. In an embodiment, a sending device divides the data into shares based on a secret sharing scheme, and sends the shares to respective network nodes in a network. These network nodes then divide their respective shares into lower-level shares based on the secret sharing scheme, and route the lower-level shares to downstream network nodes for further routing to the intended recipient device. The intended recipient device receives some or all of the lower-level shares and reconstructs the data from the received lower-level shares. In an embodiment, the secret sharing scheme is a threshold-based secret sharing scheme, such as Shamir's secret sharing scheme.

Abstract: An electronic transmitter includes: a modulator to phase modulate a carrier signal with a baseband signal using a phase modulation sequence; and an emitter to emit the phase modulated signal. The phase modulated signal has poor autocorrelation, has a corresponding mismatched filter based on the phase modulation sequence, and is configured to demodulate into the baseband signal through poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a sensing apparatus, where the emitter emits the phase modulated signal at a target and the emitted signal reflects off the target. The sensing apparatus includes a receiver that has a collector to collect the reflected signal, and a demodulator to demodulate the collected signal into the baseband signal through the poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a communication system, where the emitter emits the phase modulated signal to an intended recipient.

Abstract: A data fusion system for combining and parsing data from multiple EO and RF threat warning systems, the system including a plurality of input systems capable of providing feature-level data about an environment in which they are operating. Each input system may be configured to output information regarding its capabilities and the environment in which it is operating. A fusion block is placed in operative communication with the plurality of input systems and battlespace information and configured to algorithmically combine the data and determine the presence or absence of a threat. An output may be placed in operative communication with the fusion block, thereby allowing the fusion block to provide information and/or notifications to the relevant parties and/or systems.

Abstract: A dual mode array antenna including a ground plane, a plurality of antenna elements, a tuning mechanism for tuning the array antenna to a resonant frequency, and a base defining a cavity having a depth that is less than half of a wavelength at an upper frequency of the array antenna is disclosed. Each of the plurality of antenna elements includes at least one spiral arm and each of the plurality of antenna elements is embedded in the cavity. The dual mode array antenna operates between the upper frequency and a lower frequency and may operate in one or more resonant frequencies.

Abstract: A targeting system for guidance correction of a projectile along a flight path toward a target. The targeting system includes seeker/guidance system mounted on the projectile which controls guidance of the projectile along the flight path toward the target. A remote fire control system receives and displays a survey image of a battlefield and enables an operator to mark location coordinates of the target in the survey image. Based on the location coordinates, the fire control system defines a reference image and transmits the reference image and location coordinates to the seeker/guidance system for use in guiding the projectile toward the target. If the target moves as the projectile travels toward the target, the remote fire control system enables the operator to update the location coordinates and transmit only an offset of the coordinates to the seeker/guidance system which then adjusts or corrects the flight path of the projectile.

Abstract: Techniques are provided for implementing a portable spectrum analyzer. An example system, according to an embodiment, includes a signal analyzer including an RF receiver to receive RF signals from an antenna, an analog-to-digital converter to generate a sampled signal based on the received RF signals, and a signal analysis co-processor to perform cognitive scanning analysis of the sampled signal. The cognitive scanning analysis includes detection, identification, and characterization of digital/analog signal(s) embedded in the sampled signal. The system may further include a communications interface circuit to provide communication between the signal analyzer and an associated mobile host platform (e.g., smartphone). The communication includes transmitting results of the cognitive scanning analysis to the mobile host and receiving parameters from the mobile host to control the operation of the cognitive scanning analysis.

Abstract: A cable connector wrench and method of operation that in one example has a shaft with a pair of asymmetrical jaws at one end and a handle coupled to the other end. The two jaws form an assembly in which the jaws are joined with a pivot. The fixed jaw is attachable to the shaft and the movable jaw is coupled to the fixed jaw. The movable jaw and the fixed jaw cooperate to engage a connector of a cabled assembly wherein the connector wrench is adapted for tightening or loosening the connector of the cabled assembly.

Abstract: A system and method for liquid cooling an optical bench to provide for thermal stability. The liquid cooled bench may optionally be chilled with a cold plate. In some cases, individual components which generate excess heat contain circulating fluid connected to a network of channels within the optical bench to provide for cooling and even distribution of liquid flow and temperature.

Abstract: A dual mode array antenna including a ground plane, a plurality of antenna elements, a tuning mechanism for tuning the array antenna to a resonant frequency, and a base defining a cavity having a depth that is less than half of a wavelength at an upper frequency of the array antenna is disclosed. Each of the plurality of antenna elements includes at least one spiral arm and each of the plurality of antenna elements is embedded in the cavity. The dual mode array antenna operates between the upper frequency and a lower frequency and may operate in one or more resonant frequencies.

Abstract: A system for low light level image sensing is provided having: A photodiode; a transfer gate disposed in a center of the photodiode; an active gate disposed surrounded by the transfer gate; a plurality of microlenses, each microlens being disposed over a portion of the photodiode and directing light away from the transfer gate towards the photodiode

Abstract: The system and method represents a high-resolution, three-dimensional, multi-static precipitation RADAR approach that employs agile microsatellites, in formation and remotely coupled, via a new high-precision, ultra-low power, remote timing synchronization technology. This system and method uses multi-static RADAR interferometric methods implemented via a microsatellite formation to synthesize an effectively large (e.g., 15 m) aperture to provide about 1 km horizontal resolution and about 125 m vertical resolution in the Ku-band.

Abstract: A multiple target tracking, data association, and track file management system (MTT, DA, and TFM) specifically developed for a ground based EO/IR camera proposed in this present disclosure is intended for three main purposes: (1) providing a ground-based combat vehicle with multiple mission capability by adding a new low cost EO/IR sensor with MTT, DA, and TFM functionalities built-in to interact with the ground-based fire control and command guidance for both surface-to-surface and surface-to-air defense missions; (2) serving as a plug-and-play integrated sensor with built-in MTT functionalities easily adaptable to be used for other missions; (3) part of the weapon GN&C subsystem to function in a smart fashion allowing projectiles to work in a collaborative engagement fashion.

Abstract: A method and system for nonlinear trajectory shaping guidance law capable of providing a robust guidance solution suitable for multi-mission, multi-mode operations. The nonlinear trajectory shaping guidance law offers (1) a dual layered GL gains calculation: (i) NTS time varying adjustment accounting for engine on/off and L/D variation and (ii) general explicit guidance algorithm based sub-optimal fixed-gain selection while still maintaining its trajectory shaping capability for short range to go missions; (2) flight path angle (FPA) command tracking and following to ensure a high probability of target destruction while minimizing collateral damages; (3) high precision impact point calculation factoring in target location errors or motion and maneuvering uncertainties.; and (4) heading error angle minimization.

Abstract: A mechanical Q-switch for use with lasers. The Q-switch has a spinning disk mounted to a motor. The disk has a slot notched out of the disk. In some cases, the slot is located on the perimeter of the disk. In other cases, the slot is spaced away from the perimeter of the disk. The slot rotates through the focal point of the laser to provide Q-switching capability. In some cases, the disk is translated in a first direction or a second direction to intercept the focal point with the slot to provide Q-switching capability.

Abstract: A wide angle MWIR F-theta lens with an F# of 2. The lens is deployed on airborne platforms for remote sensing applications. The lens is corrected for monochromatic and chromatic aberrations over the wavelength range 5000 nm-3300 nm. The image of the remote target is formed on a focal plane which may constitute CCD or CMOS with micro lenses. The lens comprises four groups of optical elements with a cold shield/aperture stop located behind the last group. One embodiment of the lens includes five types of optical materials and while another embodiment of the lens includes only two types of optical materials.

Abstract: A phase controller for rapid, accurate, stable phase shifting of a continuous wave (cw) laser output combines and adjusts reference paths from before and after an EOPM to obtain maximum constructive interference when the EOPM control voltage is zero. A control voltage V for maximum destructive interference is then determined and regulated to produce and maintain a 180 degree phase shift. The output phase can then be shifted by switching the control voltage to the output of a voltage shifter that shifts V by a specified percentage. The phase shifter can divide the control voltage in half to provide a 90 degree phase shift. The cw laser can function as a seed to a pulsed laser, thereby controlling the pulse phases. Quadrature phase laser pulse pairs can be used for quadrature LiDAR detection. Embodiments include a plurality of voltage shifters for 4-phase quadrature shifting and/or shifting between arbitrary phase values.

Abstract: Systems and methods related to pre-processing images and estimating PSFs for image deblurring in a noise-robust manner. The pre-processing may include iteratively denoising a reference image, iteratively denoising a scene image containing at least one straight edge within the scene image while preserving the at least one straight edge. The pre-processing may include smoothing, subtracting and dividing to provide a pre-processed image. The PSF-estimation process may include generating, with the at least one processor, a first noise value from portions of an edge intensity profile, generating a second noise value from a difference between the edge intensity profile and an integral of the noise-regularized inversion of the integration operator operating on the edge intensity profile and determining a value of a local curvature regularization parameter resulting in the first noise value and the second noise value being within a tolerance range.

Abstract: An amplifier generate harmonic noise or nuisance signals when the amplifier enters into a nonlinear amplification event. The harmonic noise or nuisance signals are spurious and a tagging circuit may tag them as such so they bypass signal processing logic and provide the same to a downstream hardware device that skips the signals tagged as spurious. The system uses a spurious signal detector and a comparator to identify nonlinear amplification events containing harmonic noise below an amplitude threshold that indicates the harmonic noise or nuisance signals as spurious to the downstream hardware device. Typically, the system is incorporated into an electronic warfare system such that the downstream hardware device effectuates countermeasures for a manned or unmanned platform.

Abstract: An analog-to-digital converter (ADC) module includes a plurality of frequency stacked ADCs. A splitter splits channels into two segments to transmit the signal through respective low pass and high pass filters to send the analog signal to a low frequency ADC and a high frequency ADC along each channel. When using a quad-tuner having four channels, there are eight ADCs: four high frequency ADCs and four low frequency ADCs. Typically, there is one ADC associated with each channel. Thus, a quad-tuner would be used with an ADC module having four ADCs. However, by splitting and filtering each channel and increasing the number of ADCs in the ADC module, the system, assembly, and method in the present disclosure is able to increase the frequency bandwidth throughput along legacy radio frequency (RF) cables on a platform without the need of replacing any legacy hardware or the legacy RF cables.

Abstract: A method for determining the presence of interference on a GPS receiver is described. The method involves monitoring global positioning system data received by a receiver under known non-interfering conditions, storing the data for analysis and, at a later time, comparing the data, over a period of time, with the position output of a pure inertial navigation system to determine the presence of characteristics indicating interference.